A practical handbook on measurement uncertainty :FAQs and fundamentals for metrologists /

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"Version: 20240701"--Title page verso.Includes bibliographical references.part A. Understanding the fundamentals of measurement uncertainty. 1. Using correct terminology -- 1.1. Quantity and quantity value -- 1.2. The measurand and parameter -- 1.3. Accuracy and precision -- 1.4. Standard uncertainty and uncertainty contribution -- 1.5. Error, uncertainty, and expanded uncertainty2. Why do we need to evaluate uncertainty? -- 3. Should we talk about the 'evaluation' or 'calculation' of uncertainty? -- 4. What uncertainty is not -- 5. Various error terms and bias -- 6. The Guide to the expression of uncertainty in measurement (GUM)--the new approach -- 7. The law of propagation of uncertainty -- 8. Why is standard deviation used instead of variance? -- 9. Using pooled standard deviation -- 10. Some uncommon uncertaintiespart B. Dealing with distributions. 11. The normal distribution, the t-distribution, and the standard normal distribution -- 12. Do Type A and Type B evaluations correspond to random and systematic errors? -- 13. What about reproducibility in uncertainty evaluation? -- 14. How is it that we can combine different distributions? -- 15. Guidelines for the selection of triangular and trapezoidal distributions -- 16. Aren't higher confidence level and larger uncertainty contradictory? -- 17. Mind the correlations -- 17.1. The correlation coefficientpart C. Sample size and analysis. 18. Sampling distributions -- 18.1. Sampling error -- 19. The sample size dilemma -- 20. Sample size--another approach -- 21. Addressing the uncertainty of a single measurement -- 21.1. How do we proceed if no such information of previous data or history is available?part D. Decoding degrees of freedom. 22. Why is degrees of freedom generally (n - 1) in type A evaluation? -- 23. Why is degrees of freedom generally '[infinity]' in type B evaluation? -- 24. Effective degrees of freedom--some considerationspart E. Some contiguous concepts. 25. What is the significance of the sensitivity coefficient? -- 26. Dealing with corrections -- 27. The test uncertainty ratio: use only as a guiding phenomenon -- 28. Guarding conformity decisions -- 28.1. What is a guard band?part F. Delving a little deeper. 29. Treating dominant non-Gaussian components -- 30. Sample analysis--how normal is the Normal? -- 31. Sample analysis--detecting the outliers -- 32. Analyzing the results -- 32.1. Analysis of the results -- 33. The proper reporting of uncertainty -- 34. Alternative approaches in uncertainty evaluation -- 35. Some important notes in the GUMAppendix A. Coefficients for the Shapiro-Wilk test and the W statistic for various p-values -- Appendix B. Some useful web sites.Full-text restricted to subscribers or individual document purchasers.In the field of metrology, measurement uncertainty has a special place of its own since 'no measurement result is complete without explicit statement about its uncertainty'. Hence for all accredited laboratories, evaluation of measurement uncertainty is a mandatory requirement. The purpose of the book is to clarify the rationale behind certain assumptions or ideas in measurement uncertainty, present the concepts from practical perspective, help readers arrive at a realistic uncertainty figure and be a ready-reference handbook. The book can serve as a quick reference book on basic concepts in measurement uncertainty. The book is written in a manner so that practicing metrologists can open any chapter and start reading. The topics covered are applicable across all fields of scientific measurements.Also available in print.Mode of access: World Wide Web.System requirements: Adobe Acrobat Reader, EPUB reader, or Kindle reader.Swanand Rishi graduated in electrical engineering with distinction in 1986, (with specialization in power electronics) from College of Engineering, Pune, India, and completed a Diploma in Business Management (DBM) with Gold medal in 1998. After graduation until 1995, Swanand worked in several manufacturing industries with products such as UPS/power conditioners, capacitors and lightning arrestors. In those companies, he served in various sections including Production, Quality, R&D, Testing and Marketing. He was instrumental in bringing down rejection of certain capacitors from over 40% down to 5% by radical changes in manufacturing process through measurement assurance and using QC tools. In a UPS manufacturing firm, he was project manager for supply of a unique UPS to India's ambitious missile system. Since 1995, Swanand has been with the Electronics Test & Development Centre (ETDC), Pune, India; a Test and Calibration laboratory under STQC Directorate, Ministry of Electronics & IT, Government of India. He was In-charge of the calibration lab when ETDC got its first accreditation in 2002 for electrical and thermal calibration and significantly contributed to establishing the quality system as per ISO/IEC 17025. Currently he is working as Head (QA & Training) in ETDC, Pune. Since 1998 he has taught in courses and seminars conducted by ETDC on calibration (electrical and thermal), laboratory management per ISO/IEC 17025, measurement uncertainty and certified calibration professional. He has published a few papers in national and international journals/conferences. He was also a faculty member for contact-session courses on the Statistical Process Control (SPC) for MS (Quality Management) programme for post-graduate students of Birla Institute of Technology & Science, Pilani, India. He was a regular guest-lecturer in engineering colleges on subjects such as measurements, testing and calibration; QMS and was also an external project examiner. He was a member of 'Syllabus Review committee' for engineering courses and is also an ISO 9000 Lead Assessor.Title from PDF title page (viewed on August 1, 2024).

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: .,

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1 online resource (various pagings) :illustrations (some color).

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English

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9780750364621

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620/.0044

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TECHNOLOGY & ENGINEERING / Measurement.
Measurement uncertainty (Statistics)
Mensuration & systems of measurement.

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Swanand Rishi.

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